diff options
| -rw-r--r-- | libpcsxcore/cdrom.c | 234 | ||||
| -rw-r--r-- | libpcsxcore/cdrom.h | 2 |
2 files changed, 76 insertions, 160 deletions
diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c index bcf83e7..95e1f05 100644 --- a/libpcsxcore/cdrom.c +++ b/libpcsxcore/cdrom.c @@ -130,6 +130,13 @@ unsigned char Test23[] = { 0x43, 0x58, 0x44, 0x32, 0x39 ,0x34, 0x30, 0x51 }; // so (PSXCLK / 75) = cdr read time (linuzappz) #define cdReadTime (PSXCLK / 75) +enum drive_state { + DRIVESTATE_STANDBY = 0, + DRIVESTATE_LID_OPEN, + DRIVESTATE_RESCAN_CD, + DRIVESTATE_PREPARE_CD, +}; + // for cdr.Seeked enum seeked_state { SEEK_PENDING = 0, @@ -218,166 +225,76 @@ static void setIrq(void) psxHu32ref(0x1070) |= SWAP32((u32)0x4); } +// timing used in this function was taken from tests on real hardware +// (yes it's slow, but you probably don't want to modify it) void cdrLidSeekInterrupt() { - // turn back on checking - if( cdr.LidCheck == 0x10 ) - { - cdr.LidCheck = 0; - } - - // official lid close - else if( cdr.LidCheck == 0x30 ) - { - // GS CDX 3.3: $13 - cdr.StatP |= STATUS_ROTATING; - - - // GS CDX 3.3 - ~50 getlocp tries - CDRLID_INT( cdReadTime * 3 ); - cdr.LidCheck = 0x40; - } - - // turn off ready - else if( cdr.LidCheck == 0x40 ) - { - // GS CDX 3.3: $01 - cdr.StatP &= ~STATUS_SHELLOPEN; - cdr.StatP &= ~STATUS_ROTATING; - - - // GS CDX 3.3 - ~50 getlocp tries - CDRLID_INT( cdReadTime * 3 ); - cdr.LidCheck = 0x50; - } - - // now seek - else if( cdr.LidCheck == 0x50 ) - { - // GameShark Lite: Start seeking ($42) - cdr.StatP |= STATUS_SEEK; - cdr.StatP |= STATUS_ROTATING; - cdr.StatP &= ~STATUS_ERROR; - - - CDRLID_INT( cdReadTime * 3 ); - cdr.LidCheck = 0x60; - } - - // done = cd ready - else if( cdr.LidCheck == 0x60 ) - { - // GameShark Lite: Seek detection done ($02) + switch (cdr.DriveState) { + default: + case DRIVESTATE_STANDBY: cdr.StatP &= ~STATUS_SEEK; - cdr.LidCheck = 0; - } -} - -static void Check_Shell( int Irq ) -{ - // check case open/close - if (cdr.LidCheck > 0) - { - CDR_LOG( "LidCheck\n" ); + if (CDR_getStatus(&stat) == -1) + return; - // $20 = check lid state - if( cdr.LidCheck == 0x20 ) + if (stat.Status & STATUS_SHELLOPEN) { - u32 i; - - i = stat.Status; - if (CDR_getStatus(&stat) != -1) - { - // BIOS hangs + BIOS error messages - //if (stat.Type == 0xff) - //cdr.Stat = DiskError; - - // case now open - if (stat.Status & STATUS_SHELLOPEN) - { - // Vib Ribbon: pre-CD swap - StopCdda(); - StopReading(); - - - // GameShark Lite: Death if DiskError happens - // - // Vib Ribbon: Needs DiskError for CD swap - - //if (Irq != CdlNop) - { - cdr.Stat = DiskError; - - cdr.StatP |= STATUS_ERROR; - cdr.Result[0] |= STATUS_ERROR; - } - - // GameShark Lite: Wants -exactly- $10 - cdr.StatP |= STATUS_SHELLOPEN; - cdr.StatP &= ~STATUS_ROTATING; - - - CDRLID_INT( cdReadTime * 3 ); - cdr.LidCheck = 0x10; - - - // GS CDX 3.3 = $11 - } - - // case just closed - else if ( i & STATUS_SHELLOPEN ) - { - cdr.StatP |= STATUS_ROTATING; - - CheckCdrom(); - - - if( cdr.Stat == NoIntr ) - cdr.Stat = Acknowledge; - - setIrq(); + StopCdda(); + cdr.DriveState = DRIVESTATE_LID_OPEN; + CDRLID_INT(0x800); + } + break; - // begin close-seek-ready cycle - CDRLID_INT( cdReadTime * 3 ); - cdr.LidCheck = 0x30; + case DRIVESTATE_LID_OPEN: + if (CDR_getStatus(&stat) == -1) + stat.Status &= ~STATUS_SHELLOPEN; + // 02, 12, 10 + if (!(cdr.StatP & STATUS_SHELLOPEN)) { + StopReading(); + cdr.StatP |= STATUS_SHELLOPEN; - // GameShark Lite: Wants -exactly- $42, then $02 - // GS CDX 3.3: Wants $11/$80, $13/$80, $01/$00 - } + // could generate error irq here, but real hardware + // only sometimes does that + // (not done when lots of commands are sent?) - // case still closed - wait for recheck - else - { - CDRLID_INT( cdReadTime * 3 ); - cdr.LidCheck = 0x10; - } - } + CDRLID_INT(cdReadTime * 30); + break; } + else if (cdr.StatP & STATUS_ROTATING) { + cdr.StatP &= ~STATUS_ROTATING; + } + else if (!(stat.Status & STATUS_SHELLOPEN)) { + // closed now + CheckCdrom(); + // cdr.StatP STATUS_SHELLOPEN is "sticky" + // and is only cleared by CdlNop - // GS CDX: clear all values but #1,#2 - if( (cdr.LidCheck >= 0x30) || (cdr.StatP & STATUS_SHELLOPEN) ) - { - SetResultSize(16); - memset( cdr.Result, 0, 16 ); - - cdr.Result[0] = cdr.StatP; + cdr.DriveState = DRIVESTATE_RESCAN_CD; + CDRLID_INT(cdReadTime * 105); + break; + } + // recheck for close + CDRLID_INT(cdReadTime * 3); + break; - // GS CDX: special return value - if( cdr.StatP & STATUS_SHELLOPEN ) - { - cdr.Result[1] = 0x80; - } + case DRIVESTATE_RESCAN_CD: + cdr.StatP |= STATUS_ROTATING; + cdr.DriveState = DRIVESTATE_PREPARE_CD; + // this is very long on real hardware, over 6 seconds + // make it a bit faster here... + CDRLID_INT(cdReadTime * 150); + break; - if( cdr.Stat == NoIntr ) - cdr.Stat = Acknowledge; + case DRIVESTATE_PREPARE_CD: + cdr.StatP |= STATUS_SEEK; - setIrq(); - } + cdr.DriveState = DRIVESTATE_STANDBY; + CDRLID_INT(cdReadTime * 26); + break; } } @@ -626,7 +543,8 @@ void cdrInterrupt() { cdr.Result[0] = cdr.StatP; cdr.Stat = Acknowledge; - if (cdr.LidCheck == 0) cdr.LidCheck = 0x20; + if (cdr.DriveState != DRIVESTATE_LID_OPEN) + cdr.StatP &= ~STATUS_SHELLOPEN; break; case CdlSetloc: @@ -747,8 +665,6 @@ void cdrInterrupt() { cdr.Result[0] = cdr.StatP; cdr.Stat = Complete; // cdr.Stat = Acknowledge; - - if (cdr.LidCheck == 0) cdr.LidCheck = 0x20; break; case CdlPause: @@ -1046,7 +962,18 @@ void cdrInterrupt() { break; } - Check_Shell( Irq ); + if (Irq != CdlNop) { + switch (cdr.DriveState) { + case DRIVESTATE_LID_OPEN: + case DRIVESTATE_RESCAN_CD: + case DRIVESTATE_PREPARE_CD: + SetResultSize(2); + cdr.Result[0] = cdr.StatP | STATUS_ERROR; + cdr.Result[1] = 0x80; + cdr.Stat = DiskError; + break; + } + } cdr.ParamC = 0; @@ -1196,8 +1123,6 @@ void cdrReadInterrupt() { // update for CdlGetlocP ReadTrack(cdr.SetSector); - - Check_Shell(0); } /* @@ -1628,6 +1553,7 @@ void cdrReset() { cdr.Channel = 1; cdr.Reg2 = 0x1f; cdr.Stat = NoIntr; + cdr.DriveState = DRIVESTATE_STANDBY; pTransfer = cdr.Transfer; // BIOS player - default values @@ -1685,17 +1611,7 @@ int cdrFreeze(void *f, int Mode) { } void LidInterrupt() { - cdr.LidCheck = 0x20; // start checker - getCdInfo(); - StopCdda(); - CDRLID_INT( cdReadTime * 3 ); - - // generate interrupt if none active - open or close - if (cdr.Irq == 0 || cdr.Irq == 0xff) { - cdr.Ctrl |= 0x80; - cdr.Stat = NoIntr; - AddIrqQueue(CdlNop, 0x800); - } + cdrLidSeekInterrupt(); } diff --git a/libpcsxcore/cdrom.h b/libpcsxcore/cdrom.h index fc1df46..c2c5464 100644 --- a/libpcsxcore/cdrom.h +++ b/libpcsxcore/cdrom.h @@ -97,7 +97,7 @@ typedef struct { u8 Seeked; - u8 LidCheck; + u8 DriveState; u8 FastForward; u8 FastBackward; u8 pad; |